Coating Technology Of Fasteners

Coating technology refers to a surface treatment technology in which a specific coating is coated on the surface of an object with certain equipment and technology to generate a compact, continuous and uniform film on the surface, and then dried and cured by natural or artificial methods to form a protective or decorative coating.

Zinc-chromium coating is the most widely used coating technology in fasteners. It refers to the zinc chromium coating on the iron and steel parts, through the full closed cycle coating baking so as to form a coating on the surface of the iron and steel parts, also called Dacro treatment, which has the following excellent characteristics.

1)NSS can reach 500 ~ 1000 Hrs.

2) Good permeability.

3) No hydrogen embrittlement sensitivity.

4) Low environmental pollution.

5) As a fastener, its torque-preload consistency is very good.

6) Moderate price (about 2 times galvanized).

Dacro treatment mainly has the following disadvantages:

1) Poor wear resistance (hardness is only 1 H).

2) Single color (only silver white and silver gray), poor decorative effect.

3) poor electrical conductivity, so it should not be used for conductive connection parts.

As a one-stop fastener company, we can provide a wide range of fasteners including stainless steel nuts, carbon steel nuts, 4 prong t nuts, bolts, screws, washers, and so on. Non-standard custom fasteners are also available as long as you provide the corresponding requirements and drawings. If you want to wholesale fasteners or want to consult fastener-related knowledge, please contact us, and our experienced service team will reply to you as soon as possible.